Hognose Web Site

I just updated my Hognose Home Page Website and added quite a few photos and sheets on Lystrophis species. Whike I have quite a few photos of the Lystrophis dorbignyi group, I have as yet been unable to find any good taxonomic info on the subspecies. If anyone has any monographs on the subspecies of L. dorbignyi, I would appreciate information on them.